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Search took 0.00 seconds. Search: Posts Made By: Phoebe3

Forum: Electrical | Charging, Systems, Solar and Generators

09-02-2018, 12:59 AM

Replies: 73

How long can you run AC from batteries?

Views: 23,867

Posted By Phoebe3

This question seems to come up all the time,...

This question seems to come up all the time, which is why I asked here on the forum. After reading all the responses, I think the short, back-of-the-envelope answer is that you can run a typical...

Forum: Electrical | Charging, Systems, Solar and Generators

08-29-2018, 10:20 PM

Replies: 73

How long can you run AC from batteries?

Views: 23,867

Posted By Phoebe3

I was kind of basing that final divisor on a...

I was kind of basing that final divisor on a comment in an earlier thread from, I think, MarkoPolo or Avanti or ? that s/he had 400 AH of AGM and could get about 2 hours of AC from it. But I didn't...

Forum: Electrical | Charging, Systems, Solar and Generators

08-29-2018, 09:29 PM

Replies: 73

How long can you run AC from batteries?

Views: 23,867

Posted By Phoebe3

Would this be a good equation? Total number...

Would this be a good equation?

Total number of combined battery AHs

MINUS 20% (battery reserve)

MINUS 15% (inverter power "cost")

DIVIDED by 120 (just 'cause that's how it works out)

Forum: Electrical | Charging, Systems, Solar and Generators

08-22-2018, 09:27 PM

Replies: 73

How long can you run AC from batteries?

Views: 23,867

Posted By Phoebe3

Thank you for taking the time to answer my...

Thank you for taking the time to answer my question! Looks like my initial calculations were off by an order of magnitude (330 AH instead of 33 AH) and, like the compressor refrigerator, the AC will...

Forum: Electrical | Charging, Systems, Solar and Generators

08-19-2018, 01:17 PM

Replies: 73

How long can you run AC from batteries?

Views: 23,867

Posted By Phoebe3

How long can you run AC from batteries?

I need some help with my math and, also, with real world experience.

If I have a 13,500 BTU AC, does that translate to 3,956 Watts?

Does 3,950 Watts at 120V translate to 33 Amps?

Therefor,...

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